The Polotsk–Kurzeme fault belt extending for 600 km is bounded by sublatitudinal faults of Šilute–Polotsk in the south and Liepaja–Lokno in the north. It is easily distinguished in the magnetic and gravity fields, as well as from the activation of several faults at various tectonic stages, including the recent stage.
The Gotland tectonic belt running from the southeast to the northwest for a distance of 500 km is distinguished in the Baltic Sea. In the region of Klaipeda geothermal anomaly both belts join forming a tectonic sigmoid (a horizontal flexure that looks like a knee-shaped bending in the plan-view), which the authors named the Klaipeda sigmoid. This bending is well identified in the turn of thermal anomalies and potential geophysical fields.
The Klaipeda sigmoid shows a complicated structure and is broken by numerous faults of various (both orthogonal and diagonal) orientations.

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2011 - Vol.53
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